I'm not sure what the ammo bug is, but they've apparently fixed the teleportation bug for Atheon.
If you have any spare ammo increasing ability on your armour and you die you will lose a fraction of your reserve ammo of that type. There's also the bug where if you use an ammo pack while dead you will gain nothing but still get the 5 minute cooldown and consume the ammo pack.
I will wait for reports back from other people if the teleport bug is indeed fixed, maybe they've managed to introduce a new bug at the same time

There's still the gate bug where you can get teleported back into mars/venus, the problems with minotaurs either instantly regenerating shields or becoming invincible. Theres also the bug where you spawn inside the portals with a red shield but that's pretty rare. Then there's still the bug where you can get hit through the relic shields bubble.